/**
 * @Author：ming
 * @Date：2023/10/2 9:39 PM
 * @Filename：Hj8
 */

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

/**
 * @author ming
 */
public class Hj18 {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String str ;
        while ((str=br.readLine())!=null){

        }
    }

}
